<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>翻转世界</title>
    <style>
        .text {
            font-size: 40px;
            color: #000;
        }
    </style>
</head>
<body>
    <div id="app">
        <p class="text">{{ msg }}</p>
        <button @click="reverse">逆转世界</button>
    </div>
    <script src="./vue.js"></script> 
    <script>
        const app = new Vue({
            el: '#app',
            data: {
                msg: 'Hello,World'
            },
            methods: {
                reverse () {
                    this.msg = this.msg.split('').reverse().join('')
                }
            }
        })
    </script>
</body>

</html>